<template>
	<view>
		<view class="search-box"><uni-search-bar :focus="true" :radius="100" @input="input" cancelButton="none"></uni-search-bar></view>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
			<view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item)">
				<view class="goods-name">{{ item.goods_name }}</view>
				<uni-icons type="arrowright" size="16"></uni-icons>
			</view>
		</view>
		<!-- 搜索历史 -->

		<view class="history_box" v-else>
			<!-- 标题区域 -->
			<view class="history_title">
				<text>搜索历史</text>
				<uni-icons type="trash" size="17" @click="clean"></uni-icons>
			</view>
			<!-- 列表区域 -->
			<view class="history_list">
				<uni-tag :text="item" customStyle="margin:5px 5px 0px 0px" v-for="(item, index) in histories" :key="index" @click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
</template>

<script>
export default {
	data() {
		return {
			searchValue: '',
			timer: null,
			//搜索的结果列表
			searchResults: [],
			//搜索关键词的历史记录
			historyList: ['a', 'app', 'apple']
		};
	},
	methods: {
		//input 输入事件的处理函数
		input(e) {
			// 清除
			clearTimeout(this.timer);
			this.timer = setTimeout(() => {
				this.searchValue = e;
				this.getSearchList();
			}, 500);
		},
		async getSearchList() {
			// 判断关键词是否为空
			if (this.searchValue.length === 0) {
				this.searchResults = [];
				return;
			}
			const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.searchValue });
			if (res.meta.status !== 200) return uni.$showMsg();
			this.searchResults = res.message;

			this.saveSearchHistory();
		},
		gotoDetail(item) {
			console.log(item);
			uni.navigateTo({
				url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
			});
		},
		saveSearchHistory() {
			// this.historyList.push(this.searchValue);

			const set = new Set(this.historyList);
			set.delete(this.searchValue);
			set.add(this.searchValue);
			this.historyList = Array.from(set);
			// 对搜索历史进行持久化的存储
			uni.setStorageSync('kw', JSON.stringify(this.historyList));
		},
		clean() {
			this.historyList = [];
			uni.setStorageSync('kw', '[]');
		},
		gotoGoodsList(kw) {
			uni.navigateTo({
				url: '/subpkg/goods_list/goods_list?query=' + kw
			});
		}
	},
	computed: {
		histories() {
			return [...this.historyList].reverse();
		}
	},
	onLoad() {
		this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]');
	}
};
</script>

<style lang="less">
.search-box {
	position: sticky;
	top: 0px;
	z-index: 999;
}

.sugg-list {
	padding: 0px 5px;
	.sugg-item {
		font-size: 12px;
		padding: 13px 0;
		border-bottom: 1px solid #efefef;
		display: flex;
		align-items: center;
		justify-content: space-between;
		.goods-name {
			white-space: nowrap;
			overflow: hidden;
			text-overflow: ellipsis;
		}
	}
}

.history_box {
	padding: 0px 5px;
	.history_title {
		display: flex;
		justify-content: space-between;
		align-items: center;
		height: 40px;
		font-size: 13px;
		border-bottom: 1px solid #efefef;
		.history_list {
			display: flex;
			flex-wrap: wrap;
		}
	}
}
</style>
